The fraction of double degenerates among DA white dwarfs

被引：95

作者：

Maxted, PFL ^{[1
]}

Marsh, TR ^{[1
]}

机构：

[1] Univ Southampton, Dept Phys & Astron, Southampton SO17 1BJ, Hants, England

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 1999年 / 307卷 / 01期

关键词：

techniques : radial velocities; binaries : spectroscopic; stars : evolution; stars : rotation; supernovae : general; white dwarfs;

D O I：

10.1046/j.1365-8711.1999.02635.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the results of a radial velocity survey designed to measure the fraction of double degenerates among DA white dwarfs. The narrow core of the H alpha line was observed twice or more for 46 white dwarfs yielding radial velocities accurate to a few km s(-1). This makes our sun;ey the most sensitive to the detection of double degenerates undertaken to date. We found no new double degenerates in our sample, though Ha emission from distant companions is seen in two systems. Two stars known to be double degenerates prior to our observations are included in the analysis. We find a 95 per cent probability that the fraction of double degenerates among DA white dwarfs lies in the range [0.017, 0.19].

引用

页码：122 / 130

页数：9

共 18 条

[1] A SPECTROSCOPIC DETERMINATION OF THE MASS-DISTRIBUTION OF DA WHITE-DWARFS [J].

BERGERON, P ;

SAFFER, RA ;

LIEBERT, J .

ASTROPHYSICAL JOURNAL, 1992, 394 (01) :228-247

[2] MASSES OF DA WHITE-DWARFS WITH GRAVITATIONAL REDSHIFT DETERMINATIONS [J].

BERGERON, P ;

LIEBERT, J ;

FULBRIGHT, MS .

ASTROPHYSICAL JOURNAL, 1995, 444 (02) :810-817

[3] TEMPERATURES, GRAVITIES, AND MASSES FOR A SAMPLE OF BRIGHT DA WHITE-DWARFS AND THE INITIAL-TO-FINAL MASS RELATION [J].

BRAGAGLIA, A ;

RENZINI, A ;

BERGERON, P .

ASTROPHYSICAL JOURNAL, 1995, 443 (02) :735-752

[4] DOUBLE DEGENERATES AMONG DA WHITE-DWARFS [J].

BRAGAGLIA, A ;

GREGGIO, L ;

RENZINI, A ;

DODORICO, S .

ASTROPHYSICAL JOURNAL, 1990, 365 (01) :L13-L17

[5] The temperature scale and mass distribution of hot DA white dwarfs [J].

Finley, DS ;

Koester, D ;

Basri, G .

ASTROPHYSICAL JOURNAL, 1997, 488 (01) :375-396

[6] LIMITS ON THE SPACE DENSITY OF DOUBLE DEGENERATES AS TYPE-IA SUPERNOVA PROGENITORS [J].

FOSS, D ;

WADE, RA ;

GREEN, RF .

ASTROPHYSICAL JOURNAL, 1991, 374 (01) :281-287

[7] The formation of double degenerates and related objects [J].

Han, ZW .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1998, 296 (04) :1019-1040

[8] AN OPTIMAL EXTRACTION ALGORITHM FOR CCD SPECTROSCOPY [J].

HORNE, K .

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC, 1986, 98 (604) :609-617

[9]

Iben I, 1997, ASTROPHYS J, V475, P291, DOI 10.1086/303525

[10] OBSERVATIONAL LIMITS ON COMPANIONS TO G29-38 [J].

KLEINMAN, SJ ;

NATHER, RE ;

WINGET, DE ;

CLEMENS, JC ;

BRADLEY, PA ;

KANAAN, A ;

PROVENCAL, JL ;

CLAVER, CF ;

WATSON, TK ;

YANAGIDA, K ;

DIXSON, JS ;

WOOD, MA ;

SULLIVAN, DJ ;

MEISTAS, E ;

LEIBOWITZ, EM ;

MOSKALIK, P ;

ZOLA, S ;

PAJDOSZ, G ;

KRZESINSKI, J ;

SOLHEIM, JE ;

BRUVOLD, A ;

ODONOGHUE, D ;

KATZ, M ;

VAUCLAIR, G ;

DOLEZ, N ;

CHEVRETON, M ;

BARSTOW, MA ;

KEPLER, SO ;

GIOVANNINI, O ;

HANSEN, CJ ;

KAWALER, SD .

ASTROPHYSICAL JOURNAL, 1994, 436 (02) :875-884

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